// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_GFX_GEOMETRY_POINT_F_H_
#define UI_GFX_GEOMETRY_POINT_F_H_

#include <string>

#include "ui/gfx/geometry/point_base.h"
#include "ui/gfx/geometry/vector2d_f.h"
#include "ui/gfx/gfx_export.h"

namespace gfx {

// A floating version of gfx::Point.
class GFX_EXPORT PointF : public PointBase<PointF, float, Vector2dF> {
public:
    PointF()
        : PointBase<PointF, float, Vector2dF>(0, 0)
    {
    }
    PointF(float x, float y)
        : PointBase<PointF, float, Vector2dF>(x, y)
    {
    }
    ~PointF() { }

    void Scale(float scale)
    {
        Scale(scale, scale);
    }

    void Scale(float x_scale, float y_scale)
    {
        SetPoint(x() * x_scale, y() * y_scale);
    }

    // Returns a string representation of point.
    std::string ToString() const;
};

inline bool operator==(const PointF& lhs, const PointF& rhs)
{
    return lhs.x() == rhs.x() && lhs.y() == rhs.y();
}

inline bool operator!=(const PointF& lhs, const PointF& rhs)
{
    return !(lhs == rhs);
}

inline PointF operator+(const PointF& lhs, const Vector2dF& rhs)
{
    PointF result(lhs);
    result += rhs;
    return result;
}

inline PointF operator-(const PointF& lhs, const Vector2dF& rhs)
{
    PointF result(lhs);
    result -= rhs;
    return result;
}

inline Vector2dF operator-(const PointF& lhs, const PointF& rhs)
{
    return Vector2dF(lhs.x() - rhs.x(), lhs.y() - rhs.y());
}

inline PointF PointAtOffsetFromOrigin(const Vector2dF& offset_from_origin)
{
    return PointF(offset_from_origin.x(), offset_from_origin.y());
}

GFX_EXPORT PointF ScalePoint(const PointF& p, float x_scale, float y_scale);

inline PointF ScalePoint(const PointF& p, float scale)
{
    return ScalePoint(p, scale, scale);
}

#if !defined(COMPILER_MSVC)
extern template class PointBase<PointF, float, Vector2dF>;
#endif

} // namespace gfx

#endif // UI_GFX_GEOMETRY_POINT_F_H_
